{"product_id":"carrier-transformer-fk4cnf005000ahaa","title":"OEM Carrier Transformer HT01BL233 for Model FK4CNF005000AHAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Transformer HT01BL233 for Model FK4CNF005000AHAA\u003c\/h1\u003e\n\u003cp\u003eThis genuine OEM Carrier control transformer (HT01BL233) converts line voltage to the 24-volt control power that operates the thermostat, contactor, and control board on your Carrier FK4CNF005000AHAA fan coil. This transformer supports every heating and cooling call — when it fails the low-voltage control system shuts down completely, resulting in a blank thermostat and a unit that won't respond or start. A blown transformer is among the most common and affordable HVAC repairs, typically triggered by a brief control-circuit short. This OEM part matches the FK4CNF005000AHAA's exact primary\/secondary voltage and VA rating, delivering clean, correctly-rated 24V power that off-brand substitutes may not provide. Installation is moderate: with power disconnected, a technician transfers the primary and secondary leads, verifies the VA rating, and mounts it in roughly 20-30 minutes. Because it wires into line voltage, professional installation is recommended. We stock this transformer and ship same-day on orders placed before 3PM CST. Bring your control circuit back online quickly with a true Carrier OEM transformer engineered for lasting reliability.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model FK4CNF005000AHAA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62942921425267,"sku":"carrier-transformer-fk4cnf005000ahaa","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-carrier-transformer-fk_6dc27a1f-eae1-40c4-a8d7-e0b3c1bab4f9.jpg?v=1781473963","url":"https:\/\/nationalhvacparts.com\/products\/carrier-transformer-fk4cnf005000ahaa","provider":"National HVAC Parts","version":"1.0","type":"link"}